[turbofan] Relax effects and context for JSToNumber(x:plain-primitive).

test/unittests/compiler/js-typed-lowering-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 179 matching lines @@
                        p1, p2),
       context));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsSelect(kMachAnyTagged, p0, IsTrueConstant(),
                        IsBooleanNot(IsNumberEqual(p2, IsNumberConstant(0)))));
 }
 
 
 // -----------------------------------------------------------------------------
+// JSToNumber
+
+
+TEST_F(JSTypedLoweringTest, JSToNumberWithPlainPrimitive) {
+  Node* const input = Parameter(Type::PlainPrimitive(), 0);
+  Node* const context = Parameter(Type::Any(), 1);
+  Node* const effect = graph()->start();
+  Node* const control = graph()->start();
+  Reduction r = Reduce(graph()->NewNode(javascript()->ToNumber(), input,
+                                        context, effect, control));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsToNumber(input, IsNumberConstant(0),
+                                          graph()->start(), control));
+}
+
+
+// -----------------------------------------------------------------------------
 // JSStrictEqual
 
 
 TEST_F(JSTypedLoweringTest, JSStrictEqualWithTheHole) {
   Node* const the_hole = HeapConstant(factory()->the_hole_value());
   Node* const context = UndefinedConstant();
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   TRACED_FOREACH(Type*, type, kJSTypes) {
     Node* const lhs = Parameter(type);
@@ skipping 405 matching lines @@
           IsStoreElement(
               access, IsIntPtrConstant(bit_cast<intptr_t>(&backing_store[0])),
               key, value, effect, control));
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8